And then change
PHP Code:
$this->userfield["fieldxx"] = ($this->userfield["fieldxx"] ? $this->userfield["fieldxx"] . ", " . $this->fetch_field('email') : $this->userfield["fieldxx"]);
to
PHP Code:
$this->userfield["fieldxx"] = ($this->userfield["fieldxx"] ? $this->userfield["fieldxx"] . ", " . $this->fetch_field('email') : $this->fetch_field('email'));
to make it work correctly